linux-kernel - Re: [driver-core PATCH v5 9/9] libnvdimm: Schedule device registration on node local to the device

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Message-ID: <1541550393.196084.202.camel@acm.org>
Date:   Tue, 06 Nov 2018 16:26:33 -0800
From:   Bart Van Assche <bvanassche@....org>
To:     Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Cc:     linux-nvdimm@...ts.01.org, tj@...nel.org,
        akpm@...ux-foundation.org, linux-pm@...r.kernel.org,
        jiangshanlai@...il.com, rafael@...nel.org, len.brown@...el.com,
        pavel@....cz, zwisler@...nel.org, dan.j.williams@...el.com,
        dave.jiang@...el.com
Subject: Re: [driver-core PATCH v5 9/9] libnvdimm: Schedule device
 registration on node local to the device

On Mon, 2018-11-05 at 13:12 -0800, Alexander Duyck wrote:
> This patch is meant to force the device registration for nvdimm devices to
> be closer to the actual device. This is achieved by using either the NUMA
> node ID of the region, or of the parent. By doing this we can have
> everything above the region based on the region, and everything below the
> region based on the nvdimm bus.
> 
> By guaranteeing NUMA locality I see an improvement of as high as 25% for
> per-node init of a system with 12TB of persistent memory.

Thank you for having included the performance numbers.

Reviewed-by: Bart Van Assche <bvanassche@....org>